Separable fastener



July 7, 1931. J, p BENNETT 1,813,434

SEPARABLE FASTENER Filed April 22, 1950.

tix-y Patented July 7, 1931 UNITED STATES JOHN PUGH BENNETT, OF WITTON, BIRMINGHAM, ENGLAND SEPARABLE FASTENER Application led April 22, 1930, Serial No. 446,256, and in Great Britan May 3, 1929.

This invention relates to` separable fast.- eners of the kind comprising two stringers having thereon fastener' members adapted to be linterlocked and disengaged by the 6 action of a slider or cam, the invention having particular reference to fasteners of the type which are adapted to be completely disengaged or separated at both ends.

The object ofthe present invention is to 10 devise an improved form of fastener of the above character and the invention consists in a fastener. of the kind referred to having on one Stringer or tape member a hook or socket adapted to engage with a prong, pin

or projection upon the other member to facilitate engagement or disengagement, the pin or like member being preferably formed with an extended portion adapted to protect and reinforce the raw or free edge of the tape or Stringer upon which such prong or the like is mounted.

The invention also consists in a fastener of the above character in which both the pin and hook or like members are provided with extended portions adapted to protect and reinforce the raw or free edge of the respective tapes or stringers.

Another feature of the invention resides in making the pin and socket members out of substantially fiat pieces of metal and folding the same around the edge of the Stringer and in suitably anchoring the members .on the ends of the stringer.

In another of its aspects, my invention provides improved means for anchoring the interengaging pin and socket members in position on the stringers which includes means for interengagin with the endmost interlocking members o the fastener series.

Further features of the invention will be apparent from the description given hereafter. J

In the accompanying drawings Figure l is a plan view of a separable fastener embodying the invention;

Figure 2 is a Similar View to Figure 1 showing the two stringers separated;

Figure 3 is a part sectional plan view on a larger scale illustrating the various parts of the separable fastener according to the invention in their operative positions;

Figure 4 is a cross-section on line 4--4 of Flgure 3 looking upwardly;

Figure 5 is a longitudinal section on line 5-5 of Figure 3.

In carrying my invention' into effect in one convenient manner, I form the fastener with the usual tapes, stringers or side members 1,'2 on the edges of which are clamped or otherwise secured the fastener elements or jaw members 3 adapted to be interlocked and disengaged by the action of the usual slider or cam 4, and at that end of the fastener which may at times require to be maintained permanently," closed or to be completely separated;`l We provide upon one of the stringers or tapes, a prong, pin or projection formed from sheet metal or other. Suitable material folded over the cord 6 which is normally attached to the edges of the tape 2. The material forming this prong is continued away from the edge of the Stringer to which the members are attached and extends across the tape 2 which is embraced between the two extending portions 7, 8 of the prong member so that such portions form a protection for the raw edge of the tape. Between such extended portions and the prong or projection, We form a longitudinal slot 9, and the prong may if desired abut against the end interlocking member, While preferably additional rigidity is imparted to the structure by continuing the folded metal or material as at l() between the end interlocking member and the one adjacent thereto and by attaching the tape protective portion to the tape by means of a' rivet 11 or similar device.

By reason of this construction, the endmost interlocking member on stringer l is interengaged with the socket member 12 through openings 12a in the material of such member, and also the endmost interlocking member on the Stringer 2 projects through the opening 10a in the longitudinal edge of the pin member 5. Thus both the pin and socket members are securely interlocked With the endmost fastener members and they are more securely anchored on the stringers since wings 13, 14 which are preferably formed with extensions 15, 16 secured by rivets 11 or otherwise to the tape. The socket is thus formed in the hollow bent portion with a front cross-connecting piece 17 so arranged that the prong 5 on the opposite stringer can be threaded into the rectangular member 12 until the inner edge of the cross-connecting piece reaches the inner end of the longitudinal slot 9 between the prong and its extensions, the arrangement being such that after thus being threaded the prong is prevented from being disengaged laterally by the front cross-connecting piece while the parts are so proportioned that the interlocking members upon the tapes'or stringers are brought into correct vertical relationship for engagement by the action of the slider cam.

The hollow rectangular member 12 is located and held relative to the interlocking members 3 on the stringer 1 by butting up against the end interlocking member and by means of an extension 18 which is located between the end interlocking member and the one adjacent thereto, such extension also serving as a locating stop for the sliding cam device when engaged by the slider wedging portion to prevent the withdrawal of the latter from the tape or stringer.

In operation for the purpose of engaging two stringers the cam slider 4 is ushed to the extreme end ofthe Stringer 1 tted with the hollow rectangular member .12. The

.prong 5 is then'threaded through the top of the slider cam and into the socket which is within the mouth or channel of the slider, and if the slider be now operated in the usual manner the interlocking members are brought into correct relationship and the fastener is closed.

For the purpose of disengaging the stringers the slider is pushed to the extremeend of the fastener and the stringer containing the prong portion is withdrawn through the top of the cam slider. A

While I have in this application specifically described one embodiment which my invention may assume in practice, it will be understood that this embodiment is merely for the purposes of illustration and description and that various other forms may be devised within the scope of my invention as defined in the appended claims.v

What I claim as my invention is:

1. In a fastener of the class described, a pair of stringers, opposed series of fastener members carried by said stringers, a slider for engaging and disengaging said members 2. In a fastener adapted to be completelyl separated at both ends, a pair of strlngers opposed series of fastener members o n sai stringers, a slider movable along said stringers to engage `and disengage said members and a separable end connection for sai stringers comprising a socket member on one stringer and a pin member on the other stringer for insertion in said socket, said pin and socket members each being formed of a flat piece of metal bent upon itself around the edge of one stringer and to form integral lateral extensions to stiffen Athe stringer, the bend in said socket member being spaced from the edge of the stringer to provide a socket inside the bend spaced.

laterally from the stringer.

3. In a fastener adapted to be completely separated at bot-h ends, a pair of stringers opposed series of fastener members on sai stringers, a slider movable along said stringers to engage and disengage said members and a separable end connection for sai stringers comprising a pin member on one stringer and a cooperating socket member on the other stringer to receive and hold said pin member, said socket member being Vinterengaged with the endmost fastener member on its stringer whereby the same is more securely anchored on said stringer.

4. In a fastener adapted to be completely separated at both ends, a pair of stringers, opposed series of fastener members on said stringers, a slider movable along said stringers to engage and disengage said members, and `a separable end connection for said stringers Vcomprising a socket member on one stringer and a pin member on the other stringer, both of said members being interengaged with the endmost fastener members on their respective stringers whereby they are more securely anchored to the stringers.

5. In a fastener adapted to be completely separated at both ends, a pair of stringers, opposed series of fastener members on said stringers, a slider movable along said stringers to engage and disengage said members, and a separable end connection for said stringers comprising a socket member made of a flat piece of metal with its ends bent to lie on opposite sides of the stringer and its bent portion projecting laterally from the Stringer to form a Socket, and an opening insaid socket member in which the endmost fastener member on its Stringer is engaged.

for anchoring Said socket member on the Stringer, and a pin member on the opposite stringerfor engagment with said socket.

6. In a fastener adapted to be completely separated at both ends, a pair of stringers, opposed Series of fastener members on said stringers, a slider movable along Said stringers to engage and disengage said members, and a separable end connection for said stringers comprising a socket member on one Stringer and a pin member on the other Stringer, both of said members lcomprising substantially flat pieces of metal bent around said stringe-rs lwith the end portions of each piece lying on opposite sides of the Stringer and constituting extensions to stiifen the ends of the stringers, the socket being formed inwardly of the bent portion of one of said members, and the pin member being formedby the portion of the other of said members whichis bent around the edge of the stringers, the metal adjacent said edge andinwardly of said pin being cut away to provide a freely projecting prong adapted to be received in said socket, and .means for anchoring said members on said strin ers.

7. n a fastener adapted to be completely Separated at both ends, a pairy of stringers, opposed series of fastener members on said stringers, a slider movable along said stringers to engage and disengage Said members,-

and a separable end connection for said stringers comprising a socket member on one Stringer and a pin member on the other Stringer, both of Said members comprising substantially -flat pieces of metal bent around said Stringer with the end portions of each piece lying on opposite sides of the Stringer and constituting extensions to stiffen the ends of the stringers, the socket being formed inwardly of the bent portion of one of Said members, and the pin member being formed by the portion o'f the other of said members which is bent around the edge of the stringcr, the metal adjacent said edge and inwardly of said pin being cut away to provide a freely projecting prong adapted to be received in said socket, .and means fo'r an! choring said members on said stringers comprising rivets through said extensions and stringers, and extensions of the metal of said members engaged between the fastener members on the respective stringers.

. 8. In a fastener adapted to be completely Separated at both ends, a pair of stringers,

opposed series of fastener members on saidv stringers, a slider movable along said stringers to engage and'disengage said members, and a separable end connection for Said stringers comprising a socket member on one Stringer and a pin member on the other Stringer for insertion in said socket, Said pin and socket members each being formed of a flat piece of metal bent u on itself around the edge of a Stringer to orm integral lateral extensions to stiffen the Stringer, the bend in said socket member being spaced from the Stringer to provide a Socket inside .the bend spaced laterally from the Stringer, said socket member having means forming a stop forthe slider.

9. In a fastener of the class described, a pair of stringers, opposed series of fastener members carried by Said stringers, a slider for 'engaging and disengaging said members, a separable end connection for said stringers comprising a socket forming member and a pin member attached to the opposed stringers, said socket forming member comprising spaced wings with parallel side extensions straddling the Stringer and attached thereto, Said sidewings extendingv outwardly from the edge of the Stringer in spaced-apart relation, and an integral connection for said side Wings spaced laterally from said stringer, a part of said integral connection being cut away to form a longitudinally extending `neetion for said stringers comprising cooperating socket and pin members attached to the opposed stringers adjacent one end of said Seriesl of elements, said socket-forming member comprising side wings spaced apart and integrally connected at a Substantial distance from the Stringer to form a longi'- tudinally extending Socket disposed laterally of the edge of the Stringer, and said wings being formed with parallel side extensions straddling the Stringer and attached securely thereto, said pin member comprising a tubu-` lar part engaged around the edge of the. Stringer, and integral side extensions Straddling the tape and attached securely thereto, said Side extensions being cutaway to provide a-longitudinall extending Slot whereby the end of said tu ular part constitutes a prong adapted for engagement in said Socket behind Said integral connecting portionof the side wings.

In testimony whereof I aix my signature.

JOHN PUGH BENNETT. 

